A team of researchers led by Caitlyn Nojiri has proposed a theory that the DNA-busting radiation from a nearby supernova may have influenced evolution on Earth, specifically in Lake Tanganyika’s cichlid fish population. The study suggests that the cosmic rays from the stellar explosion could have caused rapid species diversification in the lake around 2.5 million years ago.
The team used computer models to simulate the propagation of cosmic rays from a nearby supernova and found that the radiation could have had a significant impact on the fish’s DNA, leading to an increase in virus evolution. However, the study acknowledges that correlation does not necessarily prove causation, and more research is needed to confirm this theory.
The researchers were inspired by a 2003 Belgian election that was affected by a cosmic ray, which sparked their interest in the potential effects of cosmic rays on life on Earth. They also cited a study about the cichlids in Lake Tanganyika, which showed a rapid increase in species diversity around the same time as the supernova.
While the association between the supernova and the evolution of cichlids is intriguing, it remains to be seen whether there is enough evidence to support this theory. The study’s findings highlight the complex interplay between cosmic rays, DNA, and life on Earth, and further research will be needed to fully understand the mechanisms involved.
The team’s research was published in The Astrophysical Journal Letters, and their work provides a fascinating example of how space-based phenomena can have an impact on life on our planet.
Source: https://www.space.com/space-exploration/search-for-life/dna-busting-radiation-from-star-killing-supernova-could-have-influenced-evolution-on-earth